Silver has the distinction of being the only animal on this list to be a true action hero. As the trusty steed of the Lone Ranger, this horse provided support and transportation for the masked vigilante as he brought justice to the old west. Before Batman and Superman hit the small screen in the ‘50s and ‘60s, the Lone Ranger was the quintessential comic book hero for a legion of fans, and Silver added to his mystique. It might seem a little corny now, but when The Lone Ranger debuted on TV, no animal could hope to be as cool as Silver.